Radio W4KAZ Thanks for stopping by the virtual KazShack. Feel free to comment - I often approve them.
|
By w4kaz, created on 2007.10.31 at 16:29:17 | last changed on 2007.10.31 at 16:32:52 | I didn’t really expect to operate this DX contest, but I’m glad I did. I discovered that I’ll need a better 20 meter antenna before Sweeps, as I seem to have an intermittent connection somewhere on the 20m dipole. This antenna is at a ladder line fed dipole at 50 feet, so it should be working well enough. I was unable to load it properly. I’ve decided to ditch it in favor of a coax fed dipole in the same location. I have a vertical that I will probably deplaoy as well-just in case.
I was also happy to hear 15 meters open on both days. It has been a while since I operated a contest with my favorite band open enough for my piddly rectangular loop. Piddly or not, the 15&10 meter nested rectangular loop is a good antenna when conditions are better. It requires only one support, has a 50 ohm feedpoint, and I can turn it 90 degrees to favor a different direction. Not as good as a yagi, but better than what I had before, and its a good SWR across all of 15 meters and the contest area of 10 meters. Continue reading 2007 CQWW SSB W4KAZ SOAB LP
By w4kaz, created on 2007.10.24 at 09:35:12 | last changed on 2007.10.24 at 09:38:04 | N1LN is still chipping away at flying all of his antennas. Two more went up on Saturday for the 20 meter stack. This has been a fun project to watch go together, as I’ve not been involved with anything of this magnitude before. It is probably not so much fun for Bruce yet-he and Laurie are doing 99 percent of the work themselves. He still has a great deal of work outstanding, but it is really coming together for them very well, and they have planned for it for a long time.
I you want to see the photos, continue to the full page.
Continue reading More N1LN Antennas Flying
By w4kaz, created on 2007.10.22 at 14:02:35 | last changed on 2007.10.22 at 14:02:35 | With my other hat on, I’ve updated the PVRC-NC page of Sweepstakes content. The revised page has a bit of new content, and has been made more generic to appeal to a wider audience. Feel free to share the link.
By w4kaz, created on 2007.10.19 at 10:10:36 | last changed on 2007.10.19 at 10:10:36 | Wow, the relocated, refitted, and repaired 40m and 80m antennas really sound a lot better than before.
The 80m folded dipole is also now almost perfect from an SWR standpoint. It is under 2:1 from 3550kc thru 3850kc, and the rig’s autotuner can easily match it across the rest of the band. The low SWR sweet spot is about 150kc wide, and centered on 3700kc. This antenna was constructed per cookbook dimensions from the ARRL Antenna book’s chapter on ‘portable’ antennas.
I’ve also worked out a switching arrangement for 20m and 160m, which both require an antenna tuner. 20m is a ladder line fed dipole, and the 160m antenna is a 160 foot long inverted-L with about 70 feet vertical. I have the inv-L routed through my jumbo homebrew tuner to an MN-2000, and the 20m direct to the MN-2000 through a balun.
I expect to add a 20m vertical soon, for a just-in-case backup/alternative. I also expect to find a way to incorporate a homebrew antenna switch to reduce the number of feed lines snaking through the yard into the basement.
But Biological Antenna Supports are still holding on to their leaves, so I have many hours of maintenance ahead.
By w4kaz, created on 2007.10.19 at 09:50:49 | last changed on 2007.10.19 at 10:12:12 | Sweepstakes 2007 is right around the corner. The CW portion is from 2100Z, Nov 3 to 0300Z, Nov 5. I have not been operating enough CW to be prepared this year, but there is still some time for me to practice. I’m relegated to S&P on CW, because I’m just not proficient enough to try to run stations. We’ll see.
If anyone is interested,there is now a drop down menu item on the PVRC Home Page which has several interesting links to Sweepstakes advice. These articles are in various formats, and anyone is welcome and encouraged to visit the pages. These are all great reads, with lots of ideas and tips.
Included among them is a link to an N6BV Hamvention presentation in which Dean provides an interesting group of maps and charts relating to Sweepstakes 2005. I think this is great planning information.
By w4kaz, created on 2007.10.14 at 19:51:16 | last changed on 2007.10.14 at 19:52:20 | I had a few minutes to spent playing around with the new antennas, just listening around. The guys calling CQ for the Pennsylvania QP were booming in here on 40m during the afternoon. The 40m dipole really seems to be hearing well.
On 80m, the new antenna was showing a very high noise level across the band, and it sounded similar to the AGC pumping from a strong nearby station.
“Hmmmmm…” thinks w4kaz, eyes vacant and scratching head idly.
Turns out my 80m antenna is now flat broadside to the WPTF 50KW antennas that are about one mile to my NNE. I have an 80m bandpass filter I built a couple of years back. Plugging that into the line cleared up the WPTF problem, dropping the broadcast QRM from S7 to S0. Its still there, but its very low level now. Not many signals on in the afternoon, so I need to carve out some time to spend in the shack playing around some.
Lesson: 50 KW at less than one mile distance is undesirable. (Yeah Homer, I know….doe-OH!)
By w4kaz, created on 2007.10.13 at 18:00:04 | last changed on 2007.10.13 at 09:29:23 | I spent much of the day tugging on lines and shooting new lines up into the trees. We had a really blustery day back in the late spring that knocked a lot of the weaker branches out of the trees. As luck would have it, one of those smacked the 80 meter folded dipole, snapping the light cord I was using to hold it up.
That was a bit of a problem. The line I had placed for 80 meters was probably 80 feet up, although the antenna was only up at about 50 feet. With the leaves already back on the trees, I couldn’t shoot a line back to the same spot, which would have been my first reaction to the problem. Instead, it forced me to think a little harder. (Queue soundtrack of rusty hinges squealing….) How best to make lemonade from the lemons?
Continue reading Biological Antenna Support Structures
By w4kaz, created on 2007.10.10 at 20:53:49 | last changed on 2007.10.10 at 20:53:49 | Scot, K9JY populated his blog for the month of September with a contesting ‘tip-O-the-day’. It makes for interesting reading and its a really good summary of contesting tips for someone new to radiosport/contesting. He’s pulled the list together as “30 Ham Radio Contesting Tips”. Heartily recommended for one and all.
By w4kaz, created on 2007.10.06 at 16:31:47 | last changed on 2007.10.06 at 16:32:28 | Well, its not especially impressive, but the ARRL DX SSB multi-single at NT4D made it into the top ten box for US multi singles. Since we didn’t really put in an exceptional effort, this is pretty good. We are agreed that we probably could have easily done better, but we took a less serious approach to the contest intending to have fun and learn few things. Conditions on Saturday morning discouraged me from running on 15 or 20 meters, as I was not serious enough to want to dig into the QRN for the weak ones. Jay feels like he could easily have done better on 40 and 80 meters. Once we get Jerry comfortable with running stations, I think we’ll be in good shape.
Anyway, its nice to be in the results box, even if its at the bottom.
By w4kaz, created on 2007.10.01 at 18:57:14 | last changed on 2007.10.02 at 20:45:28 | edited 10/02/2007, kaz
A couple of things made me curious enough to wonder what a plot of 10 meter QSO’s versus sunspot numbers would look like. So I gathered QSO data from W3LPL’s ARRL DX contests as posted to the 3830 reflector. Frank posted the QSO breakdown by band, which is what I wanted. The result is no surprise, but I found it interesting anyway. The results may appear in some future edition of the PVRC newsletter.
I have also put the article up as a static page on my website. This has the original article with a bit of supplemental information.
Continue reading QSO’s vs Sunspots
|
|
